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- Title
城际铁路先梁后拱法系杆拱桥施工监控技术研究.
- Authors
何志超; 王 虎
- Abstract
Taking an 1-96 m intercity railway tied arch bridge as an example, an economic and efficient construction scheme was developed. Systematic monitoring techniques enabled engineers to obtain stresses and deformations of the bridge. A finite element model was established in this paper to simulate the construction process, and the results from numerical simulation were compared with field measurement. Under completion state, the maximum cumulative settlement of the tie beam was 5 mm, which occured at mid-span. The maximum axial deflection was 1. 5 mm, the maximum lateral displacement of the temporary supports was 5mm. The results shows that the geometry control is effective. As the rib pressure-grouted concrete engineering is finished, the stress reaches its maximum while the tie beam stress decreases slightly. The coordinate deformation between tie beam and arch rib causes redistribution of the internal stresses. After the first tensioning of the bridge, the suspender forces at both ends are higher than at center. After the second tensioning, the suspender force is uniformly distributed with error less than 5%.
- Publication
Railway Investigation & Surveying, 2022, Vol 48, Issue 1, p71
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202110130002